`Socket_file f: The file f contains the (anonymous) port number
of a socket bound to 127.0.0.1 (This is meant as substitute for
Unix Domain sockets on Win32.)

`W32_pipe name: The Win32 pipe with this name which must
be of the form "\\.\pipe\<pname>"

`W32_pipe_file f: The file f contains the (random) name of a
Win32 pipe

`Container(socket_dir,service_name,proto_name,thread_id):
The special endpoint
of the container for service_name that is running as thread_id.
It is system-dependent what this endpoint "is" in reality, usually
a socket or named pipe. If any container of a service is meant,
the value `Any is substituted as a placeholder for a not yet
known thread_id.